build(docs): introduce release script

This change introduces a new NPM run script to automatically generate
the release changelog, as well as bump version numbers across the
code-base and create the release tag.

This script runs [Standard Version] to execute this, which is a tool
designed around automating substantial parts of the release process.
This can be done by running:

    npm run release -- [<standard-version args>]

Standard Version expects the project to adhere to the [Semantic
Versioning] convention which TF-A does not, so you may need to specify
the version manually, e.g.:

    npm run release -- --release-as 2.6.0

Individual steps of the release process may also be skipped at-will,
which may be necessary when, for example, tweaking the changelog:

    npm run release -- --skip.commit --skip.tag

Standard Version is configured by the `.versionrc.js` file, which
contains information about the Conventional Commits types and scopes
used by the project, and how they map to the changelog.

To maintain continuity with the existing changelog style - at least to
the extent possible in the move from manual to automatic creation - a
customized changelog template has been introduced, based on the
Conventional Commits template provided by Standard Version.

This template package extends the Conventional Commits template package
by introducing support for parsing the Conventional Commits scopes into
changelog sections, similarly to how they were previously organized.

[Standard Version]:
https://github.com/conventional-changelog/standard-version
[Semantic Versioning]: https://semver.org

Change-Id: I5bafa512daedc631baae951651c38c1c62046b0a
Signed-off-by: Chris Kay <chris.kay@arm.com>

1 files changed, 69 insertions, 2 deletions

diff --git a/.cz.json b/.cz.json
index cb500bac4..97d485033 100644
--- a/.cz.json
+++ b/.cz.json
@@ -1,5 +1,72 @@
 {
     "path": "./node_modules/cz-conventional-changelog",
     "maxHeaderWidth": 50,
-    "maxLineWidth": 72
-}
\ No newline at end of file
+    "maxLineWidth": 72,
+    "types": [
+        {
+            "type": "feat",
+            "title": "New Features",
+            "description": "A new feature"
+        },
+        {
+            "type": "fix",
+            "title": "Resolved Issues",
+            "description": "A bug fix"
+        },
+        {
+            "type": "build",
+            "title": "Build System",
+            "description": "Changes that affect the build system or external dependencies",
+            "hidden": true
+        },
+        {
+            "type": "ci",
+            "title": "Continuous Integration",
+            "description": "Changes to our CI configuration files and scripts",
+            "hidden": true
+        },
+        {
+            "type": "docs",
+            "title": "Build System",
+            "description": "Documentation-only changes",
+            "hidden": true
+        },
+        {
+            "type": "perf",
+            "title": "Performance Improvements",
+            "description": "A code change that improves performance",
+            "hidden": true
+        },
+        {
+            "type": "refactor",
+            "title": "Code Refactoring",
+            "description": "A code change that neither fixes a bug nor adds a feature",
+            "hidden": true
+        },
+        {
+            "type": "revert",
+            "title": "Reverted Changes",
+            "description": "Changes that revert a previous change",
+            "hidden": true
+        },
+        {
+            "type": "style",
+            "title": "Style",
+            "description": "Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc.)",
+            "hidden": true
+        },
+        {
+            "type": "test",
+            "title": "Tests",
+            "description": "Adding missing tests or correcting existing tests",
+            "hidden": true
+        },
+        {
+            "type": "chore",
+            "title": "Miscellaneous",
+            "description": "Any other change",
+            "hidden": true
+        }
+    ],
+    "sections": []
+}