feat(profile): rewrite org README for full-portfolio overview

profile/.markdownlint-cli2.yaml

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+# Org profile README markdownlint overrides
+#
+# Scoped to `profile/` only. Repo-root `.markdownlint-cli2.yaml` continues to
+# govern every other markdown file in this repo at the strict 160-char limit.
+#
+# This config replaces (not merges with) the parent when markdownlint-cli2
+# discovers it for files in this directory. Profile READMEs require inline
+# HTML and tolerate long badge URLs that standard markdown can't express —
+# the same pattern as `JacobPEvans/.markdownlint-cli2.yaml`.
+config:
+  # Badge URLs and image alt text produce unavoidably long lines.
+  MD013: false
+
+  # Allow duplicate headings in different sections (siblings only).
+  MD024:
+    siblings_only: true
+
+  # Profile READMEs require inline HTML for:
+  # - Centered badge rows (<p align="center">)
+  # - Italic taglines under banners (<em>)
+  # - Linked badge images (<a><img>)
+  MD033:
+    allowed_elements:
+      - a
+      - div
+      - em
+      - img
+      - p
+      - picture
+      - source

profile/.readme-validator.yaml

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+# README validator config for the dryvist GitHub org profile.
+#
+# This is an org profile README (renders at https://github.com/dryvist), not a
+# project README. Installation/Usage sections don't apply — the org profile is
+# a landing page, not a manual. Scoped to `profile/` only; the repo's own
+# README.md at the root continues to use validator defaults.
+#
+# Mirrors `JacobPEvans/.readme-validator.yaml` (profile-repo equivalent).
+required_sections:
+  - What lives here
+optional_sections:
+  - Org-wide standards