Update Sound Fields README.md to include time domain function information and dependencies

Sound Fields/README.md

@@ -9,6 +9,7 @@ The current structure of the section is shown below.
 - Generation
   - Point source
     - Frequency domain
+    - Time domain
     - Wave domain (spherical harmonics)
   - Plane wave
     - Frequency domain
@@ -34,5 +35,6 @@ The current structure of the section is shown below.
 Some implementations use dependencies from [Utilities/Generic](https://gitlab.com/in-nova/in-nova/-/tree/main/Utilities/Generic?ref_type=heads). The necessary files, as well as the relevant functions are listed below:
 
 - MATLAB
-  - `ptSrcField()` requires `twoPtDist()` from [Utilities/Generic](https://gitlab.com/in-nova/in-nova/-/tree/main/Utilities/Generic?ref_type=heads)
-  - `planeWaveSH()` requires `sphHarm()` and `idsft()` from [Sound Fields](https://gitlab.com/in-nova/in-nova/-/tree/main/Sound%20Fields) (this folder)
\ No newline at end of file
+  - `ptSrcField()` requires `twoPtDist()` from [Utilities/Generic](https://gitlab.com/in-nova/in-nova/-/tree/main/Utilities/Generic?ref_type=heads).
+  - `planeWaveSH()` requires `sphHarm()` and `idsft()` from [Sound Fields](https://gitlab.com/in-nova/in-nova/-/tree/main/Sound%20Fields) (this folder).
+  - `ptSrcFieldTD()` requires `twoPtDist()` from from [Utilities/Generic](https://gitlab.com/in-nova/in-nova/-/tree/main/Utilities/Generic?ref_type=heads).