Group README entries by type into TV Series / Documentaries / Movies

[andygrunwald]

Summary

The single `## Movies` heading becomes three: TV Series, Documentaries, Movies. Empty groups are hidden, so today's all-Documentary catalogue renders with one section; future typed entries pick up their bucket automatically.

Why

The `type` field on every entry was unused for layout. Grouping by it gives the README a clearer skeleton without any schema churn — and bakes in the right shape for upcoming biopics or docuseries.

What changed

• `app/cmd/convertJsonToReadme.go`: new `groupedMovies` struct + `groupMoviesByType` helper. The handler buckets entries once by `Type` and passes the struct to the template instead of a flat slice.
• `assets/README.template`: TOC and body restructured into three guarded sections; the per-entry rendering block is lifted into a named `{{ define "entry" }}` partial so the three section bodies stay short.
• Empty / unknown `Type` falls into Documentaries silently — `validateCategoryAndType` already warns at YAML→JSON time, so there's no second warning needed at render time.

Sample TOC (current catalogue)

```

Table of Contents

• Entries: 32
• Documentaries (32)
  • Angular: The Documentary
  • …
• How to contribute
• Projects like us
  ```

Mixed-type smoke test

Flipped one entry's `type` to `Movie` in its generated JSON, re-rendered: a `## Movies (1)` section appears below `## Documentaries (31)` in both TOC and body, the entry no longer shows up under Documentaries. Reverted before commit.

Test plan

• `cd app && go build ./... && go vet ./... && go test ./...` — all passing, including new `TestGroupMoviesByType`.
• `go run . convertJsonToReadme …` — TOC and headings render correctly.
• Per-entry block (description, duration, language, type, category, tags, ratings, watch link) is byte-equivalent to the old layout — only the surrounding section structure changed.

Commit-by-commit

1. Group entries by type and render three sections — code, template, test.
2. `chore: Update generated movie content` — regenerated README.

🤖 Generated with Claude Code