update index html

feat: load repositories dynamically from GitHub API

Dev

include links to repositories cards

Dev

Updated styles and text in index.html for improved clarity and consistency. Changes include color updates for badges, revised section titles, and adjustments to descriptive text.

Removed the stats strip section and related JavaScript functionality from the index.html file.

Add an "Ecosystem map" section before the repository list with an
inline SVG diagram showing how DisSModel relates to the TerraME
ecosystem (INPE) as an independent Python alternative: TerraME ->
dissmodel core, TerraME packages -> dissmodel-ca/sysdyn/abm,
LuccME -> disslucc, fillCell -> disscube, plus haloexec and
dissmodel-platform as new infrastructure.

Maturity is marked honestly: the dissmodel core is the more mature
piece; all other packages are flagged as early stage.

The SVG is inlined so it uses the site fonts; a standalone copy is
kept as ecosystem.svg for reuse. Also adds an "Ecosystem" link to the
navigation.

- ecosystem map: add brmangue-dissmodel; mark disslucc, brmangue-dissmodel
  and disscube as checked against TerraME/LuccME outputs
- case study: current brmangue-dissmodel API (sea_level_rise_rate,
  BrmangueVectorExecutor, examples/main_vector.py); Bezerra et al. (2013)
- hero and footer: Zenodo DOI for citation; link to the changelog
- softer wording: drop repeated "early stage / still taking shape" notes
- architecture: disscube reads Brazil Data Cube collections via STAC;
  fix disslucc.toml typo
- footer: building on the TerraME and LuccME tradition from INPE
- data.js: add disslucc; benchmark links for disslucc and disscube;
  validation link for brmangue-dissmodel; drop archived and removed repos