Add json output

[veerendra2]

Summary

• Add --json / -j flag for minimized, token-efficient JSON output (table fields only, no spinner)
• Add --raw-json / -r flag for full raw Fitbit API response as compact JSON
• Add output.py with table_display, json_display, and raw_json_display functions
• Update all display_* functions in formatter.py with as_json=False parameter; JSON branch returns a plain snake_case dict, table branch unchanged
• Simplify main.py to branch on output mode
• Drop Python 3.10/3.11 support; require 3.12+
• Add AGENTS.md with full contributor and agent guidance

[github-actions]

Tests	Skipped	Failures	Errors	Time
15	0 💤	0 ❌	0 🔥	0.143s ⏱️

[Copilot]

Pull request overview

Adds machine-readable JSON output modes to fitbit-cli and refactors display logic so the CLI can emit either rich tables or JSON for the same endpoints.

Changes:

• Introduces --json and --raw-json output modes and routes output selection through a new fitbit_cli/output.py module.
• Updates formatter.py display functions to support as_json dict returns in addition to table rendering.
• Updates packaging/docs (version bump, Python requirement to 3.12+, README + new AGENTS guidance).

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
setup.py	Updates metadata (license classifier) and raises python_requires to >=3.12.
fitbit_cli/output.py	New output-mode layer for table vs JSON vs raw JSON output.
fitbit_cli/main.py	Simplifies main flow to select output mode.
fitbit_cli/formatter.py	Adds as_json branches to return plain dicts; table output remains via rich.
fitbit_cli/cli.py	Adds --json/--raw-json flags and adjusts “no args” validation logic.
fitbit_cli/init.py	Bumps package version to 1.6.0.
README.md	Documents the new JSON modes and updates usage output snippet.
AGENTS.md	Adds contributor/agent guidance (but currently includes duplicated/conflicting sections).
.gitignore	Adds ignores for local/dev directories.
.envrc	Adds a direnv/pyenv layout pin (may be problematic to commit).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 6 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 4 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.