docmod: addition of description for Ford

Author: jvdp1

src/stdlib_experimental_error.f90

@@ -1,4 +1,5 @@
 module stdlib_experimental_error
+  !!Provides a support for catching and handling errors
 use, intrinsic :: iso_fortran_env, only: stderr => error_unit
 use stdlib_experimental_optval, only: optval
 implicit none

src/stdlib_experimental_io.fypp

@@ -3,7 +3,7 @@
 #:set KINDS_TYPES = REAL_KINDS_TYPES + INT_KINDS_TYPES + CMPLX_KINDS_TYPES
 
 module stdlib_experimental_io
-
+  !!Provides a support for file handling.
   use stdlib_experimental_kinds, only: sp, dp, qp, &
       int8, int16, int32, int64
   use stdlib_experimental_error, only: error_stop

src/stdlib_experimental_linalg.fypp

@@ -1,6 +1,7 @@
 #:include "common.fypp"
 #:set RCI_KINDS_TYPES = REAL_KINDS_TYPES + CMPLX_KINDS_TYPES + INT_KINDS_TYPES
 module stdlib_experimental_linalg
+  !!Provides a support for various linear algebra procedures.
   use stdlib_experimental_kinds, only: sp, dp, qp, &
     int8, int16, int32, int64
   implicit none

src/stdlib_experimental_stats.fypp

@@ -3,6 +3,8 @@
 #:set REDRANKS = range(2, MAXRANK + 1)
 #:set RC_KINDS_TYPES = REAL_KINDS_TYPES + CMPLX_KINDS_TYPES
 module stdlib_experimental_stats
+  !!Provides a support for various statistical methods. This includes currently
+  !!descriptive statistics.
   use stdlib_experimental_kinds, only: sp, dp, qp, &
       int8, int16, int32, int64
   implicit none