[DOCS] add CHANGELOG.md

Author: bnbong

CHANGELOG.md

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+# Changelog
+
+## v1.0.2 (2025-07-02)
+
+### Features
+
+- add logging feature at `--debug` mode option : debugging log will be stored at package directory
+
+### Maintenances
+
+- add coverage test report and apply it at pre-commit hook
+
+## v1.0.1 (2025-06-27)
+
+### Fixes
+
+- bump `h11` version from 0.14.0 to 0.16.0
+
+### Documentations
+
+- add github.io site for FastAPI-fastkit (with termynal & mkdocs-material)
+
+### Maintenances
+
+- add a test case : test_cli_extended.py
+
+## v1.0.0 (2025-03-01)
+
+official release version
+
+### Features
+
+- rename some `fastkit` commands:
+  - `fastkit startup` -> `fastkit startdemo`
+  - `fastkit startproject` -> `fastkit init`
+- add `fastkit addroute` command : for adding a route to project
+- add `fastkit runserver` command : for running FastAPI server
+
+### Documentations
+
+- complete contribution guides
+
+## v0.1.1 (2025-02-21)
+
+pre-release version
+
+### Fixes
+
+- modified template metadata injection modules
+
+## v0.1.0 (2025-02-13)
+
+initial release : pre-release version
+
+### Templates
+
+- add `fastapi-default` template
+- add `fastapi-asnyc-crud` template
+- add `fastapi-customized-response` template
+- add `fastapi-dockerized` template
+- add `fastapi-psql-orm` template
+
+### Features
+
+- add `fastkit` command line base structure : `fastkit <command>`
+  - add `fastkit --help` command : for more information about fastkit command
+  - add `fastkit --version` command : for version information
+  - add `fastkit --debug` command : for debugging information
+  - add `fastkit echo` command : for echo test
+  - add `fastkit list-templates` command : for listing available templates
+  - add `fastkit startup` command : for starting project with template
+  - add `fastkit startproject`command : for starting empty FastAPI project
+  - add `fastkit deleteproject` command : for deleting project
+
+### Maintenances
+
+- add test cases including template test cases
+
+### Chores
+
+- add version tag system
+- add pr-branching methods