docs: Adding placeholder pages for various tools.

* Analog tooling
   - Generators BAG, FASoC, etc
   - Manual tools KLayout, Magic, Innovus, etc

 * Digital tooling
   - Cadence Innovus
   - OpenROAD

 * Simulation tooling
   - ngspice
   - Cadence Spectre

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

docs/analog.rst

@@ -0,0 +1,13 @@
+Analog Design
+=============
+
+.. toctree::
+    :caption: Analog Design
+    :name: analog
+
+    With Cadence Virtuoso <analog/virtuoso>
+    With MAGIC <analog/magic>
+    With Klayout <analog/klayout>
+    With Berkeley Analog Generator (BAG) <analog/bag>
+    With FASoC <analog/fasoc>
+    With your design flow? <analog/new>

docs/analog/bag.rst

@@ -0,0 +1,2 @@
+TODO: analog/bag
+================

docs/analog/fasoc.rst

@@ -0,0 +1,2 @@
+TODO: analog/fasoc
+==================

docs/analog/klayout.rst

@@ -0,0 +1,2 @@
+TODO: analog/klayout
+====================

docs/analog/magic.rst

@@ -0,0 +1,2 @@
+TODO: analog/magic
+==================

docs/analog/new.rst

@@ -0,0 +1,2 @@
+TODO: analog/new
+================

docs/analog/virtuoso.rst

@@ -0,0 +1,2 @@
+TODO: analog/virtuoso
+=====================

docs/digital.rst

@@ -0,0 +1,10 @@
+Digital Design
+==============
+
+.. toctree::
+    :caption: Digital Design
+    :name: digital
+
+    With Cadence Innovus <digital/innovus>
+    With OpenROAD <digital/openroad>
+    With your design flow? <digital/new>

docs/digital/innovus.rst

@@ -0,0 +1,2 @@
+TODO: digital/innovus
+=====================

docs/digital/new.rst

@@ -0,0 +1,2 @@
+TODO: digital/new
+=================

docs/digital/openroad.rst

@@ -0,0 +1,2 @@
+TODO: digital/openroad
+======================

docs/index.rst

@@ -3,21 +3,29 @@
 .. toctree::
     :hidden:
 
-    Design Rules <rules>
-
-    contents
-
     versioning
     Current Status <status>
     known_issues
 
-    contributing
-    partners
+    Design Rules <rules>
+
+    contents
+
+    analog
+    digital
+    sim
 
     Python API <python-api/index>
 
+    previous
     glossary
 
+    contributing
+    partners
+
+
+
+
 Welcome to SkyWater SKY130 PDK's documentation!
 ===============================================
 

docs/sim.rst

@@ -0,0 +1,17 @@
+Simulation
+==========
+
+.. toctree::
+    :caption: Simulation
+    :name: sim
+
+    With Cadence Spectre <sim/spectre>
+    With ngspice <sim/ngspice>
+    With your design flow? <analog/new>
+
+.. todo::
+
+    The SkyWater SKY130 PDK provides simulation two types of simulation models.
+    :term:`Spectre models` for usage with :term:`Cadence Spectre` and
+    :term:`Spice models` which are compatible with popular open source spice
+    simulators like :term:`ngspice`.

docs/sim/ngspice.rst

@@ -0,0 +1,2 @@
+TODO: sim/ngspice
+=================

docs/sim/spectre.rst

@@ -0,0 +1,2 @@
+TODO: sim/spectre
+=================