feat: content strategy, image posts and a posting plan for the films

Adds twelve image posts made the same way as the films: six posters
(one picture of each film with its idea in two lines) and six cards
that answer a question clients ask before the first call. The answers
come from the questions and principles on the website.

The posting plan is data (six weeks, film, card and poster per week),
and the export writes the library in that order, by language, week and
day, with the text to post. All video posts now open with the hook of
their film. The reasoning is in plans/content-strategy.md.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/plans/freelance-relaunch.md

@@ -98,7 +98,7 @@ Audit of an AI-built codebase, test foundation, mutation baseline, prioritized r
 ## 6. Getting clients (low effort first)
 
 1. Own network: former colleagues from i22, Trusted Shops, sdox.io, Sevenval. Ten personal messages.
-2. LinkedIn and X: one post a week. A set of short looping videos, one per service, with post texts in English and German, is produced in `apps/video` (`node scripts/export.ts` writes `out/library`).
+2. LinkedIn first; plan, rhythm and measures in `plans/content-strategy.md`. A set of short looping videos, one per service, with post texts in English and German, is produced in `apps/video` (`node scripts/export.ts` writes `out/library`).
 3. Google Ads for German clients: search campaigns for "website" and "automation". Concept, ad texts and open prerequisites in `plans/google-ads.md`.
 4. Platforms (freelancermap, freelance.de, Web3 job boards) as a secondary channel.
 4. Direct outreach: 10 targeted messages a week with one template.