refactor(build): consolidate CAM test commands under new make targets

- .envrc: add conda compiler flags (CFLAGS, CXXFLAGS, LDFLAGS) for zlib support
- .justfile: replace inline make commands with reusable targets (test-top, test-all, test-model, test-module)
- environment.yml: reformat YAML, add zlib/gtkwave, rename withbullet → with_bullet

environment.yml

@@ -1,21 +1,24 @@
 name: mini-nav
 channels:
-  - pytorch
-  - nvidia
-  - aihabitat-nightly
-  - conda-forge
+    - pytorch
+    - nvidia
+    - aihabitat-nightly
+    - conda-forge
 dependencies:
-  - python=3.10
-  - pip
-  - habitat-sim=0.3.3
-  - habitat-baselines=0.3.320250127
-  - habitat-lab=0.3.320250127
-  - withbullet
-  - pytorch
-  - torchvision
-  - pytorch-cuda=12.1
-  # Toolsets
-  - uv
-  - verilator
-  - just
-  - nodejs>=20.0.0
+    - python=3.10
+    - pip
+    - habitat-sim=0.3.3
+    - habitat-baselines=0.3.320250127
+    - habitat-lab=0.3.320250127
+    - withbullet
+    - pytorch
+    - torchvision
+    - pytorch-cuda=12.1
+    # Lib
+    - zlib
+    # Toolsets
+    - uv
+    - verilator
+    - gtkwave
+    - just
+    - nodejs>=20.0.0